<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>插件表达式</title>
    </head>
    <body>
        <div id="app">
            <input v-model="msg"/>
            <span>{{msg}}</span>
        </div>
        <script src="vue.js"></script>
        <script>
       
       var vm = new Vue({
        el:'#app',
        data:{
            msg:'hello'
        }
       });
      
    </script>
    </body>
</html>